Go to
https://new.express.adobe.com/
Click on "Video"
Try selecting one of the templates to see how the app works.
Create a short video:
Click on "Media" on the left side of your screen and search for a video on a topic of your choice.
At the top of the Media options select "Audio" or "Photos" to add to your video
Click on "Text" to add a title to your video.
When finished, click "Share" in the top right corner.
Change the "access" settings to "anyone with link"
Copy the link and then add it to your Portfolio.